Efficient Alkaline Hydrogen Evolution Reaction Using Superaerophobic Ni Nanoarrays with Accelerated H2 Bubble Release

© 2023 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 52 vom: 01. Dez., Seite e2305844
1. Verfasser: Kim, Jaerim (VerfasserIn)
Weitere Verfasser: Jung, Sang-Mun, Lee, Noho, Kim, Kyu-Su, Kim, Yong-Tae, Kim, Jong Kyu
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article 3D nanostructures bubble release electrocatalysts hydrogen evolution reaction nickel oblique angle deposition superaerophobicity
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520 |a Despite the adverse effects of H2 bubbles adhering to catalyst's surface on the performance of water electrolysis, the mechanisms by which H2 bubbles are effectively released during the alkaline hydrogen evolution reaction (HER) remain elusive. In this study, a systematic investigation on the effect of nanoscale surface morphologies on H2 bubble release behaviors and HER performance by employing earth-abundant Ni catalysts consisting of an array of Ni nanorods (NRs) with controlled surface porosities is performed. Both aerophobicity and hydrophilicity of the catalyst's surface vary according to the surface porosity of catalysts. The Ni catalyst with the highest porosity of ≈52% exhibits superaerophobic nature as well as the best HER performance among the Ni catalysts. It is found that the Ni catalyst's superaerophobicity combined with the effective open pore channels enables the accelerated release of H2 bubbles from the surface, leading to a significant improvement in geometric activities, particularly at high current densities, as well as intrinsic activities including both specific and mass activities. It is also demonstrated that the superaerophobicity enabled by highly porous Ni NRs can be combined with Pt and Cr having optimal binding abilities to further optimize electrocatalytic performance 
650 4 |a Journal Article 
650 4 |a 3D nanostructures 
650 4 |a bubble release 
650 4 |a electrocatalysts 
650 4 |a hydrogen evolution reaction 
650 4 |a nickel 
650 4 |a oblique angle deposition 
650 4 |a superaerophobicity 
700 1 |a Jung, Sang-Mun  |e verfasserin  |4 aut 
700 1 |a Lee, Noho  |e verfasserin  |4 aut 
700 1 |a Kim, Kyu-Su  |e verfasserin  |4 aut 
700 1 |a Kim, Yong-Tae  |e verfasserin  |4 aut 
700 1 |a Kim, Jong Kyu  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Advanced materials (Deerfield Beach, Fla.)  |d 1998  |g 35(2023), 52 vom: 01. Dez., Seite e2305844  |w (DE-627)NLM098206397  |x 1521-4095  |7 nnns 
773 1 8 |g volume:35  |g year:2023  |g number:52  |g day:01  |g month:12  |g pages:e2305844 
856 4 0 |u http://dx.doi.org/10.1002/adma.202305844  |3 Volltext 
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